50results about How to "Reduce area size" patented technology

The invention relates to a work piece installing and clamping device in an ion beam polishing process and a method thereof. The work piece installing and clamping device comprises a four-groove rotary platform which is fixed on a clamping main platform, wherein four grooves are symmetrically distributed on the four-groove rotary platform in orthogonal mode, four slide fixing columns are respectively arranged on the four grooves of the four-groove rotary platform, the slide fixing columns can be fixed or loosened by screwing fixing bolts on the slide fixing columns, ceramic cap pieces are fixed on the upper surfaces of the slide fixing columns, a hanging hook is respectively positioned on the lateral faces of the slide fixing columns, and a lifting support structure is respectively installed and clamped on the slide fixing column on the lower side of the hanging hook. The work piece installing and clamping method is that the four-groove rotary platform is fixed on the clamping main platform, work pieces can be installed and clamped on the four-groove rotary platform structure through the slide fixing columns, and the distance between the work piece and the slide fixing columns can be measured by utilizing a dial gauge to rorate the four-groove rotary platform, the positions of the slide fixing columns can be moved to adjust the same distance to guarantee center uniformity of the centers of the work pieces and the installing and clamping main platform, and accordingly accurate installing and clamping of the positions of the work pieces are achieved.

The invention relates to the technical field of tunnel boring machine engineering machinery. A circular cutter box capable of bidirectionally replacing disc-shaped hobs, comprising a cylindrical ring-shaped cutter box body fixed on the cutter head and two centrally symmetrical hobs arranged inside the cutter box body Shaft fastening unit, the hob shaft fastening unit includes a load-bearing guide bar fixed on the inner wall of the knife box box, a limit position fixed on the inner wall of the knife box box and correspondingly set at a certain angle with the load-bearing guide bar Guide bars, and wedge-shaped compression blocks, tension blocks, tension bolts and nuts that are matched and arranged between the load guide bars and the limit guide bars. The circular cutter box of the present invention can respectively realize the replacement of the disc-shaped hob from the back of the cutter head and the front of the cutter head. For hob replacement during production, assembly and commissioning, the cutter box has a circular structure, which can save space and uniform force on the cutter head.

The invention discloses a light source system and a projection device. The light source system includes a first light source that emits a first laser light; a wavelength conversion device that includes three primary color light regions and a mixed color light region; a driving device that drives the wavelength conversion device to move so that the wavelength Each area of ​​the conversion device periodically receives the first laser light in time sequence; the second light source emits supplementary light, and the supplementary light is consistent with the color of the emitted light in a primary color light area; the control device controls the switch of the second light source, and the same color primary color In at least two of the whole period of time when the light area receives the first laser light, the whole time period when the mixed color light area receives the first laser light, and the partial time period when a different-color primary color light area receives the first laser light, The control device controls the second light source to be turned on. The technical solution of the invention can obtain a light source system with high luminous flux and high utilization rate of supplementary light source.

A valve guard for restricting the amount of deformation of a valve disc has a main body part abuttable with the back surface of the valve disc, and a fixation part extending to outside of a receding part. Upon mounting the valve guard to an end plate part, the fixation part is firmly attached to the outside of the receding part of the end plate part.

The invention provides a preparation method of an avalanche photodiode diffusion structure and a diode diffusion structure. The method includes: on the epitaxial wafer of the avalanche photodiode, under the action of the first photolithography mask, perform the first dopant diffusion to obtain the central circular diffusion main junction region (1) and the diffusion main junction region (1). Diffusion tank regions (2) with a predetermined distance between the junction regions; under the action of the second photolithography mask, a second dopant diffusion is performed, so that the central region (101) or edge region of the diffusion main junction region The depth of (102) is greater than the depth of the diffused main junction region obtained through the first dopant diffusion, thereby obtaining an avalanche photodiode diffused structure. The uniformity of chip breakdown voltage is regulated while suppressing edge breakdown.